Which of these cells do NOT have a role in cell-mediated immunity?
A) erythrocytes
B) antigen-presenting cells
C) T helper cells
D) T cytotoxic cells
Ans: A) erythrocytes
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True or false: the First Law of Thermodynamics states that the degree of disorder in the universe tends to increase
A. true B. false
Which of the following statements about metabolic rate is true?
A. None of these statements about metabolic rate is true. B. Larger animals consume more energy per gram of body tissue than smaller animals. C. Faster running animals have lower metabolic rates than slower running animals. D. Basal metabolic rate increases with animal mass raised to the 1/4 power. E. Larger animals have lower basal metabolic rates than smaller animals.
What is the relationship between coral and zooxanthellae?
a. Commensal; zooxanthellae are a type of algae that resides among the coral, but the coral is unaffected by its presence. b. Mutually symbiotic; zooxanthellae provide the coral with nutrition, while the coral provides zooxanthellae with carbon dioxide. c. Parasitic; zooxanthellae are a type of algae that grows inside coral, feeding off of the coral's nutrients and causing coral bleaching over time. d. There is no relationship between the two. Zooxanthellae are terrestrials animal, and coral is aquatic. e. Competitive; zooxanthellae are a type of algae that compete with coral for space and nutrients.
You believe that an adult animal you are examining is a vertebrate but concede that it may be an invertebrate chordate. Which of the following would ensure that you are indeed looking at a vertebrate?
A) It is able to swim. B) It lacks a notochord. C) Its notochord functions as an endoskeleton. D) It uses its pharyngeal gill slits for respiration. E) It has a dorsal hollow nerve cord.